Steam-turbine engine.



E. F. EDGAR.

STEAM TURBINE ENGINE. APPLICATION FILED MAY 5. 1909.

952 79 1 Patented Mar. 22, 1910.

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' A WITNESSES 5 l/I/VE/VTOR ANDREW l3v GRAHAM c0 PHOTO-LITHUGRAPNF-RSWASHINGTON. n. c.

E. F. EDGAR. STEAM TURBINE ENGINE. APPLICATION FILED MAYB, 1909.

Patented Mar. 22, 1910.

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E. F. EDGAR. STEAM TURBINE ENGINE.

APPLICATION FILED MAYS, 1909.

952;79L Patented Mar.22,1910.

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ANDREW n. GRAHAM co.. PnoTounwsRAPhgns,wnsumsToN n c F. F. EDGAR.

STEAM TURBINE ENGINE.

APPLICATION FILED MAY5, 1909.

Patented M31222, 1910.

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fllllllIIIIIllllllllllllllllllimlll WITNESSES @FFEQE ELLIS F. EDGAR, OFWOODBRIDGE, NEW JERSEY.

STEAM-TURBINE ENGINE.

To all whom "it may concern:

Be it known that I, ELLIs F. EDGAR, citizen of the United States, andresident of Voodbridge, in the county of Middlesex and State of NewJersey, have invented certain new and useful Improvements in Steam-Turbine Engines, of which the following is a specification.

Figure 1 is a plan view of a five cylinder engine. Fig. 2 is a verticalelevation view of a one-cylinder engine part in section through thepuppet valve and in front of the puppet valve. Fig. 3 is a section viewthrough a cylinder behind the puppet valve. Fig. 4: is a side view ofone of the multiple cams. Fig. 5 is an end view of one of the multiplecams. Fig. 6 is a section view through the puppet valves and upperportion of high pressure steam chests and longitudinal side elevationview of the opening and closing and full stroke cams. Fig. 7 is an endView of one of the opening and closing and full stroke cams.

I had in view in designing this engine a steam turbine capable of usingsteam at one thousand pounds pressure or more, and to be used with orwithout a cut-off valve preferably with a puppet cut-off valveand preferably with four or more cylinders, whereby an early cut-ofl' can beused thereby obtaining economy as hereinafter set forth.

Details of c0astructi0n.1, outside casing of cylinder; 2 end and innercircumference casing of cylinder; 3, movable blades; el stationaryblades; 5, high pressure steam chest; 6, first expansion steam chest; 7,second expansion steam chest; 8, puppet valve; 9, multiple cam; 10,spring for closing puppet valve; 11, bar for guiding puppet valve stemand yoke; 12, driving shaft of engine; 13, multiple cam shaft; 1%,gearing from engine shaft to multiple cam shaft; 15, driving wheel ofengine; 16, packing strips; 17, live steam line; 18, exhaust steam line;19, eX- haust port; 20, ratchet arm shaft; 21, con nection for operatingratchet arm shaft; 22, governor belt; 23, governor; 2 1, ratchet arms;25, bearing for multiple cam shaft, also bearing for the bar guiding thepuppet Valve stem; 26, plate secured to driving wheel 15.

General remar7cs.This engine of the steam turbine type is composed of acircular cylinder having two rows of steam chests extending all the wayaround from the inlet port to the exhaust port, said steam chestSpecification of Letters Patent.

Application filed May 5,

Patented Mar. 22, 1910.

1909. Serial No. 494,107.

containing the stationary blades of the en gine, which are numbered 4,and located between these two rows of steam chests and stationary blades4 are located moving blades 3, which are secured to the outer peripheryof driving wheel 15, said driving wheel being made steam tight bypacking strips 16, which bear against plates 26, both the pack ingstrips and these plates can be easily renewed. The packing strips areheld againstthese plates by springs. Driving wheel 15 is secured todriving shaft 12. Steam enter ing high pressure steam chest 5 preferablyat one thousand pounds pressure or more is guided by the stationaryblades in said steam chest 5 on moving blades 3 and through stationaryblades and steam chest 6 to the upper portion of the open space in steamchest 6, which permits of the first expansion, then passes from thebottom of the open space in said steam chest 6 through the stationaryblades there located again on moving blades 3 and through the stationaryblades located in the second expansion steam chest 7 to the upperportion of the open space in said steam chest 7, thence to the bottom ofthe open space in said steam chest 7, then through the stationary bladesthere located again on the moving blades 3, and in this manner passesbackward and forward to the steam exit, giving the desired number ofexpansions to obtain the desired economy according to the diameter ofthe engine. These steam chests increase in area from the inlet port tothe exhaust port and preferably the number of stationary blades in saidsteam chests increase in number and preferably the spacing between thesestationary blades increases in distance between said blades, while thedistance between moving blades 3 is the same. In an engine of fourcylinders or more the steam may be admitted through the puppet valves inconjunction with the multiple cams to all of the cylinders in startingand then cut off automatically at any desired point. It will readily beseen that in a 6 cylinder engine cutting off at one-sixth the strokeorin an eight cylinder cutting off at one-eighth the stroke a higheconomy may be obtained, from a simple and compact engine, and one ormore of the cylinders may be cut out of action in an engine of this typeas shown in Fig. 6 which shows the upper end of live high pressure steamchests with their balanced cylinder 1 puppet valves two open and threeclosed and a longitudinal side elevation of the opening and closing andfull stroke cams. These cams open and close the valves and allow thesteam to flow through the open valves at boiler pressure continuouslywhile open. They do not pulsate or cut off at part stroke. They canbeoperated automatically or manually as desired. Economy is obtained withthese cams by opening only enough valves to carry the load, 011e, two ormore or all as desired and by using full boiler pressure through onlyenough valves to take care of the load the highest economy can beobtained. In using the cams shown in Figs. 4a and 5 economy is obtainedby cutting off at any part ofthe stroke desired, and: the same l'oa-dcarried by simply moving the multiple cam to another cut-off, and in aneight cylinder there can be two cylinders added to desired there wouldalsobe a loss due to the While this engine may be back pressure.operated withouta cut-off valve, I prefer a cut-off valve and preferablya puppet cut-otl' valve of the type here shown. To prevent leakage bythe sides and outer ends of moving blades 3 between the back of theinlet port and the exhaust port, I would place a red metal plate heldagainst the blades at this point by springs.

I do not confine myself to the exact formof blades herein set forth as Imay change the area and shapes, or use ports in the steam chests.

.Having described my invention, what I claim as new and desire to secureby Letters Patent is 1. A steam turbine engine, having a plurality ofhigh pressure steam chests each with an inlet port containing a balancedWhile this In a one-cylinder engine the ,1 cylinder puppet valve andmeans for operat sure may be admitted through all or any number of saidvalves as desired.

2. A steam turbine engine having a plurality of high-pressure steamchests, each with an inlet port containing a puppet valve in conjunctionwith an opening and closing cam, composed of different diameters ofvarying widths of surface and so arranged at each valve whereby steam atboiler pressure may be admitted through all or'any number of said valvesas desired for the full stroke and continuously.

3. A steam turbine engine having a balanced puppet cut off valve inconjunction with a multiple cam consisting of a series of cams ofvarying length, whereby steam may be admitted to the cylinder instarting for the full revolution by moving the multiple cam to the lastcam which extends the full circle and when the engine is running steammay be admitted to the cylinder for any part of the revolution desiredby moving the multiple cam to a cam extending the desired length of thecircle and whereby the cut off will take place automatically as setforth.

a. A steam turbine engine composed of a plurality of cylinders, eachcylinder having a balanced puppet cut-off valve in conjunction with amultiple cam consisting of a series of cams of varying length, wherebysteam may be admitted in starting to all of the cylinders simultaneouslyby moving the multiple cam to the last cam which extends the full circleand when the engine is running will admit steam to each cylinderindependently and successively by moving the multiple cam to one of thecams extending only part of the circle and on diiferent locations of thecircle for each cylinder and whereby the cut off will take placeautomatically, all substantially as set forth.

Signed at New York in the county of New York and State of New York thisfourth day of May A. D. 1909.

ELLIS F. EDGAR.

l ing the same, whereby steam at boiler pres-

